Simulation device for mesoscale dry yeast fermentation

Abstract

The utility model relates to a simulation device for mesoscale dry yeast fermentation, which comprises a test chamber, a homothermal sealed chamber and an air heater, the test chamber is of a hollow structure, and the middle part of the test chamber is used for placing an experimental working medium; the same-temperature sealed cabin surrounds the periphery of the test cabin, and the space between the inner wall of the same-temperature sealed cabin and the outer wall of the vertical circumference of the test cabin and the space between the inner wall of the same-temperature sealed cabin and the outer wall of the top surface of the test cabin are filled with thermal insulation gas; the air heater is used for introducing hot air into the same-temperature sealed cabin and is fixed on the same-temperature sealed cabin; temperature control is carried out through the air heater, and the temperature of the heat preservation gas is equal to that of the experimental working medium. By adopting the scheme, when the test chamber is used for reaction, as the hot-air blower is fixed in the same-temperature sealed chamber and is used for introducing hot air into the same-temperature sealed chamber, the temperature of the heat-insulating gas can be adjusted through the hot-air blower, so that the temperature of the heat-insulating gas is equal to that of an experimental working medium in the test chamber, and the experiment of the test chamber is not influenced by the external environment; and the development of reactions such as fermentation in the test cabin is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of dry fermentation, particularly to a mesoscale dry fermentation simulation device. BACKGROUND

[0002] During the dry fermentation storage process, under certain conditions, the stored fermentation will cause carbonization, smoldering, and even fire accidents, etc. Once a fire occurs, it will cause significant losses. Dry fermentation is affected by various factors such as internal and external factors during the storage process. The fermentation reaction of some fungi and bacteria in dry fermentation will continue to raise the temperature, eventually leading to smoldering.

[0003] Microbial proliferation requires suitable conditions. Under some conditions, the fermentation reaction will become more and more intense, thus occupying a dominant position and promoting the temperature to continue to rise, eventually leading to smoldering. The environment of dry fermentation storage has its particularity. The height of the top of the pile from the ground reaches 4.7 meters. The specific environmental characteristics inside are difficult to explore and there are many unknown areas. Therefore, to understand the constraints of dry fermentation exothermic reaction, it is necessary to simulate the actual environment of the dry fermentation warehouse through a professional experimental warehouse, find out the key influencing factors and threshold, which is helpful to prevent the occurrence of such accidents.

[0004] In order to study the process of dry fermentation, a fermentation tank is often used to simulate mesoscale dry fermentation smoldering. However, the existing fermentation tank does not consider the influence of environmental temperature and other factors on fermentation during design, resulting in serious loss of fermentation heat in the fermentation tank, less heat generated by biological fermentation, and easy failure of simulation experiments. UTILITY MODEL CONTENT

[0005] Therefore, a mesoscale dry fermentation simulation device is provided to solve the problem that the environmental factor changes in the fermentation test are difficult to simulate in the prior art.

[0006] On the one hand, the utility model provides a mesoscale dry fermentation simulation device, which comprises:

[0007] The test cabin is internally hollow and has a middle part for placing experimental working medium;

[0008] The same temperature sealed cabin surrounds the outer periphery of the test cabin. The inner wall of the same temperature sealed cabin and the vertical circle outer wall of the test cabin and the top surface outer wall of the test cabin are filled with heat preservation gas;

[0009] The hot air machine is used for blowing hot air into the same temperature sealed cabin. The hot air machine is fixed on the same temperature sealed cabin;

[0010] The temperature is controlled by the hot air machine, and the temperature of the heat preservation gas and the experimental working medium is equalized.

[0011] On the basis of the above technical scheme, the utility model still can make following improvement.

[0012] In one of the implementation ways, the top of the test cabin is provided with an opening and is a feeding port, and the hot air fan is fixed to the lower part of the inner wall of the constant-temperature sealed cabin.

[0013] The vacuum insulation layer is arranged around the outer wall of the test cabin.

[0014] In one of the implementation ways, the simulation device further comprises a collection assembly, and the collection assembly comprises:

[0015] The collection box is located outside the constant-temperature sealed cabin.

[0016] The first temperature sensor is inserted into the interior of the test cabin.

[0017] The gas collector is also inserted into the interior of the test cabin.

[0018] The first temperature sensor and the gas collector are connected to the collection box.

[0019] In one of the implementation ways, the collection assembly comprises a plurality of first temperature sensors which are vertically spaced apart, and the plurality of first temperature sensors are used for collecting the temperature of the experimental working medium at different heights.

[0020] In one of the implementation ways, the gas collector is also inserted into the test cabin in the vertical direction, and the gas collector has a plurality of gas collectors, each of which is inserted into the test cabin to different depths and is used for collecting the gas of the experimental working medium at different heights.

[0021] In one of the implementation ways, the collection assembly further comprises:

[0022] The second temperature sensor is inserted into the insulation gas, and the second temperature sensor is connected to the collection box.

[0023] In one of the implementation ways, the second temperature sensor comprises at least two second temperature sensors, and the second temperature sensors are arranged close to the bottom of the constant-temperature sealed cabin.

[0024] In one of the implementation ways, the first temperature sensor and the gas collector are both inserted into the test cabin through the top of the test cabin.

[0025] In one of the implementation ways, the simulation device further comprises:

[0026] The gas pump is used for providing aeration power.

[0027] The aeration coil has one end connected to the gas pump and the other end inserted into the test cabin and used for introducing air.

[0028] In one implementation, the ventilation coil extends into the test chamber in a vertical direction, and the ventilation coil comprises:

[0029] A main pipe, which is an L-shaped linear pipe and extends to a position close to the bottom of the test chamber;

[0030] A branch pipe, which is annular and located in the test chamber, and has a plurality of and is uniformly spaced in a vertical direction, and has a plurality of gas outlets.

[0031] The utility model discloses a beneficial effect is: through setting up the same temperature sealed cabin, and the same temperature sealed cabin is in the vertical outer periphery and top of test chamber and encloses certain heat preservation space, and the heat preservation space is full of heat preservation gas, when the reaction of test chamber, because hot air blower is fixed in the same temperature sealed cabin and is used for the hot air that goes into the same temperature sealed cabin, can therefore pass through the hot air that goes into the hot air blower and adjust the temperature of heat preservation gas, make heat preservation gas and the experimental working medium in test chamber keep equal temperature, thereby make the heat preservation gas that surrounds the vertical four -quarter and top of test chamber to test chamber and play the heat preservation effect, to improve the heat preservation effect when the experiment of test chamber, therefore when the ambient environment changes or the ambient environment temperature and experimental temperature difference is too big, because of the existence of the same temperature sealed cabin, make test chamber and ambient environment through the same temperature sealed cabin and are isolated, make the experiment of test chamber not be influenced by the outside environment, thereby the development of fermentation of test chamber is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is the structural schematic diagram of the simulation device of the mesoscale dry fermentation in the embodiment.

[0033] In the drawings, the components represented by each reference numeral are as follows:

[0034] 10, test chamber; 11, feed inlet;

[0035] 20, same temperature sealed cabin; 30, hot air blower;

[0036] 41, collection box; 42, first temperature sensor; 43, gas collector; 44, second temperature sensor;

[0037] 51, gas pump; 52, ventilation coil;

[0038] 60, experimental working medium; 70, temperature controller; 80, vacuum heat preservation layer. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described here are only used to explain the present application, and are not used to limit the present application.

[0040] In order to prevent the occurrence of dry-cured smoldering, the simulation of dry-cured fermentation is carried out by the device, the fermentation during dry-cured storage is simulated by adjusting the related moisture, oxygen conditions, humidity conditions, etc., the temperature, moisture and oxygen of the dry-cured pile are monitored in real time, the data change of different parameters over time under different conditions is analyzed, and the key influencing factors of dry-cured smoldering fermentation are analyzed, so as to avoid the occurrence of dry-cured smoldering in subsequent operation.

[0041] A kind of simulation device of mesoscale dry-cured fermentation, see Figure 1 The simulation device includes test cabin 10, isothermal sealed cabin 20 and hot air machine 30, test cabin 10 is hollow structure and is used to place experimental working medium 60 in middle part;Isothermal sealed cabin 20 surrounds the outer periphery of test cabin 10, and the inner wall of isothermal sealed cabin 20 and the vertical circle outer wall of test cabin 10 and the top outer wall of test cabin 10 are all filled with heat preservation gas;Hot air machine 30 is used to introduce hot air into isothermal sealed cabin 20, and hot air machine 30 is fixed on isothermal sealed cabin 20;Temperature control is carried out by hot air machine 30, and the temperature of heat preservation gas is equal to that of experimental working medium 60.

[0042] The beneficial effects of this embodiment are: by setting isothermal sealed cabin 20, and isothermal sealed cabin 20 surrounds a certain heat preservation space in the vertical periphery and top of test cabin 10, the heat preservation space is filled with heat preservation gas, and when test cabin 10 is used for reaction, hot air machine 30 is fixed on isothermal sealed cabin 20 and used to introduce hot air into isothermal sealed cabin 20, so that the temperature of heat preservation gas can be adjusted by hot air machine 30, so that the temperature of heat preservation gas is equal to that of experimental working medium 60 in test cabin 10, so that the heat preservation gas surrounding the vertical periphery and top of test cabin 10 has heat preservation effect on test cabin 10, so as to improve the heat preservation effect of test cabin 10 during experiment;Therefore, when the surrounding environment changes or the temperature difference between the surrounding environment and the experimental temperature is too large, due to the existence of isothermal sealed cabin 20, test cabin 10 is isolated from the surrounding environment through isothermal sealed cabin 20, so that the experiment of test cabin 10 is not affected by the external environment, thereby facilitating the development of fermentation and other reactions in test cabin 10.

[0043] Specifically, if test cabin 10 is suspended, there will be a certain gap between isothermal sealed cabin 20 and the bottom of test cabin 10, and the gap is filled with heat preservation gas;In theory, the larger the proportion of the outer surface of test cabin 10 in contact with isothermal sealed cabin 20 in the total outer surface of test cabin 10, the better the heat preservation effect of isothermal sealed cabin 20 on test cabin 10.

[0044] Specifically, in addition to using hot air machine 30, other workpieces with heating effect can also be used to heat the heat preservation gas in isothermal sealed cabin 20;The heat preservation gas can be air.

[0045] In some embodiments of the present scheme, the top of the test chamber 10 is provided with an opening and is the feeding port 11, and the hot air machine 30 is fixed to the lower part of the inner wall of the constant-temperature sealed chamber 20; the simulation device further comprises a vacuum thermal insulation layer 80, which is wrapped around the outer wall of the test chamber 10. In this way, by providing the feeding port 11 at the top of the test chamber 10 and fixing the hot air machine 30 to the lower part of the inner wall of the constant-temperature sealed chamber 20, the distance between the feeding port 11 and the hot air machine 30 is increased, thereby avoiding the influence of the high-temperature gas near the hot air machine 30 on the temperature at the feeding port 11, and reducing the influence on the experimental working medium 60 in the test chamber 10. In addition, the temperature at the feeding port 11 is also protected from being lost by the constant-temperature sealed chamber 20. The vacuum thermal insulation layer 80 is provided to have a heat preservation effect on the fermented experimental working medium 60, thereby reducing the heat loss of the experimental working medium 60 through the test chamber 10. In addition, the feeding port 11 of the present application is larger and located at the top, so that the present application has a larger feeding port 11 than general fermentation devices, and can accommodate the experimental working medium 60 for solid fermentation.

[0046] In some embodiments of the present scheme, the simulation device further comprises a collection assembly, which comprises a collection box 41, a first temperature sensor 42, and a gas collector 43. The collection box 41 is located outside the constant-temperature sealed chamber 20. The first temperature sensor 42 extends into the interior of the test chamber 10. The gas collector 43 also extends into the interior of the test chamber 10. The first temperature sensor 42 and the gas collector 43 are both connected to the collection box 41. In this way, the collection assembly is provided to collect temperature and gas. The temperature of the experimental working medium 60 is collected by the first temperature sensor 42 extending into the interior of the test chamber 10, and the gas generated by the experimental working medium 60 during the reaction is collected by the gas collector 43 extending into the interior of the test chamber 10, thereby fully grasping the reaction condition of the experimental working medium 60.

[0047] In some embodiments of the present scheme, the collection assembly comprises a plurality of first temperature sensors 42 vertically spaced apart, which are used to collect the temperature of the experimental working medium 60 at different heights. In this way, the plurality of first temperature sensors 42 are provided to collect the temperature of the experimental working medium 60 at different heights, thereby facilitating the monitoring of the temperature of the experimental working medium 60 at different heights and improving the accuracy of the temperature collection data.

[0048] In some embodiments of the present scheme, the gas collector 43 also extends into the test chamber 10 in the vertical direction. The gas collector 43 has a plurality of gas collectors 43, each of which extends into the test chamber to different depths and is used to collect the gas of the experimental working medium 60 at different heights. In this way, the gas collector 43 is also used to collect the gas at different heights in the experimental working medium 60, thereby improving the accuracy of the data collection of the gas generated at different heights by the experimental working medium 60 during the reaction.

[0049] Specifically, the number of the gas collectors 43 is six.

[0050] In some embodiments of the present application, the collecting assembly further comprises a second temperature sensor 44, the second temperature sensor 44 extends into the heat preservation gas, and the second temperature sensor 44 is connected to the collecting box 41. In this way, the temperature of the heat preservation gas is collected by the second temperature sensor 44, so that the temperature of the heat preservation gas and the experimental working substance 60 is adjusted to the same, so that the reaction energy of the experimental working substance 60 is not affected by the external environment temperature.

[0051] In some embodiments of the present application, the second temperature sensor 44 includes at least two, and the second temperature sensor 44 is arranged close to the bottom of the constant-temperature sealed cabin 20. In this way, at least two second temperature sensors 44 are arranged to measure the temperature of the heat preservation gas at multiple positions, and the temperature data measured by the multiple second temperature sensors 44 are corrected with each other, so as to improve the accuracy of the temperature measurement of the heat preservation gas.

[0052] In some embodiments of the present application, the first temperature sensor 42 and the gas collector 43 enter the test cabin 10 through the top of the test cabin 10. In this way, the first temperature sensor 42 and the gas collector 43 enter the inside along the same direction of the test cabin 10, so as to reduce the opening position on the test cabin 10, reduce the exposure area of the experimental working substance 60, and facilitate the stable reaction of the experimental working substance 60.

[0053] Specifically, the first temperature sensor 42 and the gas collector 43 enter the test cabin 10 through the feed inlet 11 of the top of the test cabin 10.

[0054] In some embodiments of the present application, the simulation device further comprises an air pump 51 and an air coil 52 for providing air supply power, one end of the air coil 52 is connected to the air pump 51, and the other end of the air coil 52 extends into the test cabin 10 and is used for air supply. In this way, the air coil 52 and the air pump 51 are arranged to supply air to the experimental working substance 60 in the test cabin 10, so as to facilitate the aerobic reaction of the experimental working substance 60.

[0055] Specifically, the gas supplied into the test cabin 10 by the air coil 52 and the air pump 51 can be air or other gas containing oxygen.

[0056] In some embodiments of the present application, the ventilation coil 52 extends into the test chamber 10 along a vertical direction, and the ventilation coil 52 comprises a main pipe and a branch pipe. The main pipe is an L-shaped linear pipe and extends to a position close to the bottom of the test chamber 10. The branch pipe is annular and located in the test chamber 10. The branch pipe has a plurality of and is uniformly spaced along a vertical direction. The branch pipe has a plurality of air outlets. In this way, when the ventilation coil 52 is arranged in the test chamber 10, the stack of the experimental working medium 60 in the test chamber 10 has a certain height and width. In order to fully supplement air into the experimental working medium 60, the ventilation coil 52 is divided into the main pipe and the branch pipe, the main pipe and the branch pipe are connected, air is introduced through the main pipe, and the air introduced by the main pipe is discharged along the same height in the circumferential direction through the branch pipe. Since the branch pipe is annular, a plurality of air outlets can be formed on the branch pipe, so that the experimental working medium 60 can be supplemented with air at different vertical heights and different horizontal positions, so that the experimental working medium 60 can fully perform aerobic reaction.

[0057] Specifically, the branch pipe can be an annular structure extending at a fixed height, or the branch pipe can be an annular structure extending at an angle with the horizontal plane.

[0058] In the embodiment, the hot air machine 30 is further connected with a temperature controller 70, and the heating of the hot air machine 30 is controlled through the temperature controller 70, so as to control the temperature of the same-temperature sealed cabin 20. The temperature detected by the first temperature sensor 42 and the second temperature sensor 44 is compared with the set temperature, so as to regulate and control the switch of the temperature controller 70, so as to ensure that the temperature of the same-temperature sealed cabin 20 is the same as the temperature of the experimental working medium 60.

[0059] The operation process of the device for experiment includes: heating the experimental working medium 60 to make the moisture of the experimental working medium 60 reach the target requirement; placing the first temperature sensor 42, the ventilation coil 52 and the gas collector 43 into the test chamber in advance; placing the experimental working medium 60 into the test chamber; arranging the second temperature sensor 44 in the same-temperature sealed cabin 20 and the hot air machine 30; placing the same-temperature sealed cabin 20 outside the test chamber; starting the machine, and setting the temperature inside the same-temperature sealed cabin 20 and the test chamber to keep the temperature consistent, that is, the temperature of the experimental working medium 60 is the same as the temperature of the air in the same-temperature sealed cabin 20; monitoring the data of the collection box 41, observing the temperature rising result, observing the generated gas, judging the gas generated by the fermentation of the experimental working medium 60, and until the temperature in the test chamber rises to the specified temperature.

[0060] The present application adopts the arrangement mode of the gas collector 43 and the temperature sensor in the center, which can ensure that the collected data is in the center of fermentation, and can better obtain real data for the experiment.

[0061] The application considers the influence of oxygen and environmental factors on fermentation, avoids the problems in the prior art such as "the fermentation reaction can only be anaerobic fermentation, the temperature is difficult to exceed 47 DEG C, in order to ensure the heat preservation performance, the lack of feeding port, not applicable to solid fermentation, the lack of working medium internal gas monitoring device, unable to carry out temperature and humidity monitoring and gas monitoring, the heat preservation effect is poor, the fermentation heat loss is serious, and the experiment is easy to fail (the heat generated by biological fermentation is less)", the application is supplemented with oxygen through the aeration coil 52, and heat preservation is carried out through the isothermal sealed cabin 20, so that the loss of fermentation heat is reduced.

[0062] It should be noted that the diagrams provided in the embodiments only schematically illustrate the basic concept of the utility model, and only show the components related to the utility model in the diagrams, rather than being drawn according to the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be changed arbitrarily, and the component layout pattern can be more complex.

[0063] The structure, proportion, size and the like shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification, so that people skilled in the art can understand and read, and do not define the limiting conditions for the implementation of the utility model, and therefore do not have substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope covered by the disclosed technical content of the utility model.

[0064] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0065] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0066] In the utility model, unless another definite provision and limitation, the term "mount", "link", "connect", "fix" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect, can be two element internal communication or two element's interaction, unless another definite limitation.For the ordinary skill in the art, can understand the concrete meaning of the above-mentioned term in the utility model according to specific circumstances.

[0067] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0068] The above-described embodiments only express several implementation manners of the present application, which are described in detail and specifically, but should not be understood as the limitation of the scope of the utility model patent. It should be pointed out that for the ordinary skilled in the art, under the premise of not departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A medium-scale dry koji fermentation simulation device, characterized in that: The simulation device comprises: A test chamber (10), wherein the test chamber (10) is a hollow structure and the center thereof is used to place the experimental working medium (60); An isothermal sealed cabin (20), the isothermal sealed cabin (20) surrounding the outer periphery of the test cabin (10), the inner wall of the isothermal sealed cabin (20) and the vertical peripheral outer wall of the test cabin (10) and the top outer wall of the test cabin (10) are all filled with thermal insulation gas; a hot air blower (30), the hot air blower (30) being used to blow hot air into the isothermal sealed cabin (20), the hot air blower (30) being fixed on the isothermal sealed cabin (20); The temperature is controlled by the hot air blower (30) so that the temperature of the heat-insulating gas is equal to the temperature of the experimental working medium (60).

2. The simulation device for mesoscale dry koji fermentation according to claim 1, wherein The top of the test chamber (10) is provided with an opening which serves as a feed port (11), and the hot air blower (30) is fixed to the lower portion of the inner wall of the isothermal sealed chamber (20); the simulation device further comprises: A vacuum insulation layer (80) surrounds the outer wall of the test chamber (10).

3. The simulation device for mesoscale dry koji fermentation according to claim 1, wherein The simulation device also includes a collection component, and the collection component includes: A collection box (41), the collection box (41) is located outside the isothermal sealed cabin (20); a first temperature sensor (42), the first temperature sensor (42) extending into the interior of the test chamber (10); A gas collector (43), the gas collector (43) also extends into the interior of the test chamber (10); The first temperature sensor (42) and the gas collector (43) are both connected to the collection box (41).

4. The simulation device for medium-scale dry koji fermentation according to claim 3, wherein The collection component includes a plurality of first temperature sensors (42) distributed along vertical intervals, and the plurality of first temperature sensors (42) are used to collect the temperature of the experimental working medium (60) at different heights.

5. The simulation device for medium-scale dry koji fermentation according to claim 3, characterized in that The gas collector (43) also extends into the test chamber (10) in a vertical direction. There are multiple gas collectors (43), each of which extends into the test chamber (10) to a different depth and is used to collect gas from the experimental working medium (60) at different heights.

6. The simulation device for medium-scale dry koji fermentation according to claim 3, characterized in that The acquisition component also includes: A second temperature sensor (44), the second temperature sensor (44) extends into the heat-insulating gas, and the second temperature sensor (44) is connected to the collection box (41).

7. The simulation device for medium-scale dry koji fermentation according to claim 6, characterized in that The second temperature sensors (44) include at least two, and the second temperature sensors (44) are arranged near the bottom of the isothermal sealed cabin (20).

8. The simulation device for medium-scale dry koji fermentation according to claim 3, characterized in that The first temperature sensor (42) and the gas collector (43) both enter the test chamber (10) through the top of the test chamber (10).

9. The simulation device for mesoscale dry koji fermentation according to claim 1, characterized in that The simulation device also includes: An air pump (51) for providing ventilation power; A ventilation coil (52), one end of the ventilation coil (52) is connected to the air pump (51), and the other end of the ventilation coil (52) extends into the test chamber (10) and is used for ventilation of air.

10. The simulation device for medium-scale dry koji fermentation according to claim 9, characterized in that: The ventilation coil (52) extends vertically into the test chamber (10), and the ventilation coil (52) includes: a main pipe, the main pipe being an L-shaped linear pipe and extending to a position close to the bottom of the test chamber (10); A branch pipe is annular and located in the test chamber (10), the branch pipe is provided in plurality and is evenly spaced along the vertical direction, and the branch pipe is provided with a plurality of air outlets.

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